Inspect this reporting owner's activity
Recent SEC transactions
LANGER ROBERT: source evidence dated 2026-10-07T00:29:11.873Z.
- Publicly available
- 2026-07-31
- Trade date
- 2026-07-28
- Issuer ticker
- SEER
- Code
- A
- Shares
- 16,500
- Reported value
- Not reported
The displayed owner or issuer and source fields identify the receipt to verify; keep reporting and availability dates separate.
Which issuer and transaction does this person appear in?
Match the reviewed owner identity, issuer and transaction code. Directory eligibility does not turn every filing into a strategy signal.
SEC accession 0001239757-26-000002Use the linked SEC receipts and company profiles to verify what became public and when.
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Use the linked SEC receipts and company profiles to verify what became public and when.
Browse insider directoryKeep reporting dates and units beside the answer, and inspect its original citations.
Issuer relationships
A reporting-owner CIK identifies the filer across issuer relationships and name aliases. A filer may be an individual or an organization; the filing role is the relevant evidence.
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| WYETH | 0000005187 | WYE | No | Yes |
| Echo Therapeutics, Inc. | 0001031927 | SONT, SONTD, SONT.OB, ECTE.OB, ECTE | No | Yes |
| MOMENTA PHARMACEUTICALS INC | 0001235010 | MNTA | No | Yes |
| ALSERES PHARMACEUTICALS INC /DE | 0000094784 | BLSI, ALSE | No | Yes |
| Fibrocell Science, Inc. | 0000357097 | No | Yes | |
| MILLIPORE CORP /MA | 0000066479 | MIL | No | Yes |
| INVIVO THERAPEUTICS HOLDINGS CORP. | 0001292519 | DSGS.OB, NVIV | No | No |
| Ocata Therapeutics, Inc. | 0001140098 | ACTC, OCAT | No | Yes |
| DNIB UNWIND, INC. | 0001385228 | BIND | No | Yes |
| SELECTA BIOSCIENCES INC | 0001453687 | SELB | No | No |
| Kala Pharmaceuticals, Inc. | 0001479419 | KALA | No | Yes |
| Abpro Corp | 0001670356 | ABP | No | Yes |
| Rubius Therapeutics, Inc. | 0001709401 | RUBY | No | Yes |
| Moderna, Inc. | 0001682852 | MRNA | No | Yes |
| Frequency Therapeutics, Inc. | 0001703647 | FREQ | No | Yes |
| Lyra Therapeutics, Inc. | 0001327273 | LYRA | No | Yes |
| SQZ Biotechnologies Co | 0001604477 | SQZ | No | No |
| Seer, Inc. | 0001726445 | SEER | No | Yes |
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Recent SEC transactions
See the complete recent sec transactions
Code P identifies a purchase, S a sale and A an award. Awards and open-market purchases describe different events. Use the public availability date when deciding when a researcher could have known about the transaction.
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| 2026-07-31 | 2026-07-28 | SEER | A | 16,500 | Not reported |
| 2026-07-31 | 2026-07-28 | SEER | A | 25,000 | Not reported |
| 2025-07-10 | 2025-07-07 | SEER | A | 20,500 | Not reported |
| 2025-07-10 | 2025-07-07 | SEER | A | 30,500 | Not reported |
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Up to 50 transactions from the recent two-year owner window.
Source evidence and strategy eligibility
The transactions below come from filings; a historical tracker separately simulates following eligible events. Joint filers can report the same transaction, and an owner can have filings at multiple companies. Public availability, amendment lineage and verified coverage determine which events a historical tracker may use.
The current directory marks this owner's filing coverage verified.